Finding the Fourth Proportional to 1,388.41, 1,915.97 and 758.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.41 : 1,915.97 = 758.94 : x
2. Step 2: Convert to fraction form
   1,388.41/1,915.97 = 758.94/x
3. Step 3: Cross multiply
   1,388.41x = 1,915.97 × 758.94
4. Step 4: Simplify right side
   1,388.41x = 1,454,106.27
5. Step 5: Solve for x
   x = 1,454,106.27/1,388.41
6. Step 6: Final answer
   x = 1,047.32